Description: The Igboid languages form a cluster within the Volta–Niger phylum, most likely grouped with Yoruboid and Edoid. The greatest differentiation within the Igboid group is between the Ekpeye, and the rest. Williamson (2002) argues that based on this pattern, proto-Igboid migration would have moved down the Niger from a more northern area in the savannah and first settled close to the delta